// ------------------------------------------------------------------------------
// 
// Copyright (c) 2008 Swampware, Inc.
// 
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
// 
// ------------------------------------------------------------------------------
using System;

namespace wave
{
	/// <summary>
	/// Summary description for ConsoleIterator.
	/// </summary>
	public class ConsoleIterator : Water.Iterator
	{
		private Water.Environment _environment;

		public ConsoleIterator(Water.Environment environment)
		{
			this._environment = environment;
		}

		public override void Open()
		{
		}

		public override Water.Statement Next()
		{
			if ((this._environment.Peek("_Exit") != null) || (this._environment.Peek("_Restart") != null))
			{
				return null;
			}

			while(true)
			{
				System.Console.WriteLine();
				System.Console.Write(">");

				wave.ConsoleReader reader = new wave.ConsoleReader();
				Water.StatementParser parser = new Water.StatementParser(reader, this._environment);
				Water.Statement statement = parser.Parse();
				if(statement != null)
				{
					return statement;
				}
			}
		}

		public override void Close()
		{
		}

	}
}
